Thirunavukarasu, P (2008) Effect of chronic sinusitis on middle ear function. Masters thesis, Madras Medical College, Chennai.
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Abstract
A wide variety of diseases of the nose and paranasal sinuses may affect the function of the eustachian tube and consequently that of the middle ear. The common cold, allergic rhinitis and acute and chronic sinusitis may lead to the obstruction of the eustachian tube orifice with all the attendant consequences for the middle ear. If pathological changes occur in the nasal or paranasal sinus mucosa and the nature of secretions alter, the normal secretion routes may undergo significant changes and the two major routes may join before they reach the eustachian tube orifice, and one or both routes may form whorls around or even in the orifice itself. Abnormal infected secretions may then move directly over the eustachian tube orifice causing congestion and obstruction of the orifice due to the inflammation of its lymphoreticular tissue with slowing down of the muco ciliary clearance and may lead to impeded ventilation and/or ascending infection of the middle ear. The damage of middle ear function becomes more serious with the extent of lesion and with the longer course of the disease in the para nasal disease. Though hearing was unaffected in the study group a significantly high (65%) had elevated air conduction thresholds. Sinusitis involving the posterior groups were more likely to cause middle ear dysfunction. Middle ear volumes largely remained normal in the study groups. Patients with sclerosed mastoids are more likely to adjust poorly with negative pressures.
| Item Type: | Thesis (Masters) |
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| Uncontrolled Keywords: | middle ear function; chronic sinusitis; hearing loss; eustachian tube; mastoid pneumatisation |
| Subjects: | MEDICAL > Otorhinolaryngology |
| Depositing User: | Devi S |
| Date Deposited: | 04 Jul 2017 05:05 |
| Last Modified: | 04 Jul 2017 05:05 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/879 |
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